Anion exchange membranes composed of perfluoroalkylene chains and ammonium-functionalized oligophenylenes

Hideaki Ono, Junpei Miyake, Shigehumi Shimada, Makoto Uchida, Kenji Miyatake

研究成果: Article査読

52 被引用数 (Scopus)

抄録

A novel series of ammonium-containing copolymers (QPAFs) were synthesized as anion exchange membranes for alkaline fuel cell applications. The precursor copolymers (Mw = 28.3-90.1 kDa) composed of perfluoroalkylene and phenylene groups were obtained by a nickel promoted polycondensation reaction. Chloromethylation and quaternization reactions of the precursors provided thin and ductile QPAF membranes with ion exchange capacity (IEC) ranging from 0.79 to 1.74 meq g-1. The QPAF membranes exhibited a phase-separated morphology based on the hydrophilic/hydrophobic differences in the main chain structure. The QPAF membrane with an optimized copolymer composition and IEC = 1.26 meq g-1 showed high hydroxide ion conductivity (95.5 mS cm-1 in water at 80 °C), excellent mechanical properties (large elongation at break (218%)), and reasonable alkaline stability at 80 °C. An alkaline fuel cell using the QPAF as the membrane and electrode binder achieved the maximum power density of 139 mW cm-2 at a current density of 420 mA cm-2.

本文言語English
ページ(範囲)21779-21788
ページ数10
ジャーナルJournal of Materials Chemistry A
3
43
DOI
出版ステータスPublished - 2015
外部発表はい

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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